EP1736507B1 - Kautschukzusammensetzung für spikelose Reifenlaufflächen - Google Patents
Kautschukzusammensetzung für spikelose Reifenlaufflächen Download PDFInfo
- Publication number
- EP1736507B1 EP1736507B1 EP20060076118 EP06076118A EP1736507B1 EP 1736507 B1 EP1736507 B1 EP 1736507B1 EP 20060076118 EP20060076118 EP 20060076118 EP 06076118 A EP06076118 A EP 06076118A EP 1736507 B1 EP1736507 B1 EP 1736507B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rubber
- fiber
- rubber composition
- parts
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 229920001971 elastomer Polymers 0.000 title claims description 96
- 239000005060 rubber Substances 0.000 title claims description 96
- 239000000203 mixture Substances 0.000 title claims description 36
- 239000000835 fiber Substances 0.000 claims description 99
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 15
- 239000005062 Polybutadiene Substances 0.000 claims description 14
- 229920002857 polybutadiene Polymers 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 244000043261 Hevea brasiliensis Species 0.000 claims description 10
- 229920003052 natural elastomer Polymers 0.000 claims description 10
- 229920001194 natural rubber Polymers 0.000 claims description 10
- 239000010734 process oil Substances 0.000 claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000004088 foaming agent Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000006229 carbon black Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 6
- 230000003712 anti-aging effect Effects 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- KVBYPTUGEKVEIJ-UHFFFAOYSA-N benzene-1,3-diol;formaldehyde Chemical compound O=C.OC1=CC=CC(O)=C1 KVBYPTUGEKVEIJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 238000010074 rubber mixing Methods 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 21
- 230000003247 decreasing effect Effects 0.000 description 12
- 229920003235 aromatic polyamide Polymers 0.000 description 10
- 241000531908 Aramides Species 0.000 description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- 238000007792 addition Methods 0.000 description 7
- 238000001878 scanning electron micrograph Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- 239000002174 Styrene-butadiene Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 229920000271 Kevlar® Polymers 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 3
- 239000004761 kevlar Substances 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 239000012744 reinforcing agent Substances 0.000 description 3
- 229920001494 Technora Polymers 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004950 technora Substances 0.000 description 2
- MHSKRLJMQQNJNC-UHFFFAOYSA-N terephthalamide Chemical compound NC(=O)C1=CC=C(C(N)=O)C=C1 MHSKRLJMQQNJNC-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 125000002897 diene group Chemical group 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/046—Reinforcing macromolecular compounds with loose or coherent fibrous material with synthetic macromolecular fibrous material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2321/00—Characterised by the use of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/01—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/249933—Fiber embedded in or on the surface of a natural or synthetic rubber matrix
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/249933—Fiber embedded in or on the surface of a natural or synthetic rubber matrix
- Y10T428/249937—Fiber is precoated
Definitions
- the present invention relates, generally, to a rubber composition for a studless tire tread, and more particularly, to a rubber composition for a studless tire tread, in which natural rubber, styrene-butadiene rubber and butadiene rubber, serving as raw rubber, for use in a typical rubber composition for a studless tire tread, are appropriately mixed with a predetermined polyaramide fiber, thereby increasing not only driving force and braking power on snowy and icy roads in the winter season but also handling stability on dry roads and wear resistance.
- winter tire is largely classified into spike tire and studless tire.
- the spike tire in which spike pins are mounted to a tread in order to increase frictional force in the snowy and icy region, is advantageous because it exhibits excellent braking performance and driving performance on snowy and icy roads.
- tire products equipped with rubber spike pins functioning as micro spikes, resulting from a curing process at room temperature through the control of a glass transition temperature, have been commercialized.
- tire products containing silica acting to increase braking power on wet roads and to decrease fuel consumption, have been proposed.
- studless tires general studless tires, studless tires using an organic foaming agent, and studless tires using foreign material are exemplary.
- the studless tires using an organic foaming agent are manufactured by mixing tire tread rubber with an organic foaming agent and then vulcanizing the mixture.
- This tire has been introduced according to the concept in which the contact area between the road and the tread is increased by a microcell effect due to pores formed upon vulcanization, thus increasing the frictional force and ice gripping power, leading to a shortened braking distance of vehicles on snowy and icy roads and prevention of slip thereof.
- the foreign material dispersed in the tread rubber composition does not form a chemical bond with base rubber but forms a physical bond therewith, it is readily separated, resulting in irregular wear.
- the foreign material such as short fiber or natural fiber
- noise is decreased and environmental problems such as damage to the road are mitigated.
- the short fiber or natural fiber is spherical and thus easily separated by external impact during motion of the tire, leading to irregular abnormal wear and partial side wear. Such problems shorten the lifetime of the tire and deteriorate the performance of the tire, thus making the users discontent.
- an object of the present invention is to provide a rubber composition for a studless tire tread, which is capable of preventing abnormal wear and partial side wear of tires and improving ice braking properties by adding the predetermined polyaramide fiber having high Young's modulus and tensile strength.
- the present invention provides a rubber composition for a studless tire tread, comprising natural rubber (NR), styrene-butadiene rubber (SBR) and butadiene rubber (BR), as raw rubber, which are used in a typical rubber composition for a studless tire tread, and including 1-10 parts by weight of co-poly-(paraphenylene/3,4-oxydiphenylene terephthalamide) fiber based on 100 parts by weight of the solid content of the raw rubber.
- natural rubber NR
- SBR styrene-butadiene rubber
- BR butadiene rubber
- a rubber composition for a tire tread includes natural rubber, styrene-butadiene rubber, and butadiene rubber, as raw rubber.
- Natural rubber is naturally occurring rubber.
- Styrene-butadiene rubber resulting from an emulsion polymerization process, has, specifically 20 ⁇ 25% of styrene, a Mooney viscosity at 100°C of 55-65, and a stress relaxation time gradient of -0.30 ⁇ -0.38.
- butadiene rubber contained in the raw rubber is diene-based rubber, obtained through a solution polymerization process, and is composed of 96% or more of 1,4-cis-butadiene.
- the raw rubber may further include a typical rubber mixing agent.
- the rubber mixing agent include process oil, a reinforcing agent, and other additives.
- the process oil is preferably composed of 5 ⁇ 25% of an aromatic component, 25 ⁇ 45% of a naphthene component, and 35 ⁇ 65% of a paraffin component. If the composition of the process oil falls outside of the above range, that is, if the amount of the aromatic component is increased, ice braking performance is deteriorated.
- the process oil is used in an amount of 20-35 parts by weight, based on 100 parts by weight of the solid content of the raw rubber.
- the carbon black and silica, serving as the reinforcing agent are not particularly limited, and are used in an amount of 40-90 parts by weight based on 100 parts by weight of the solid content of the raw rubber. If the above amount is less than 40 parts by weight based on 100 parts by weight of the raw rubber, rotation resistance is increased but ice braking performance is deteriorated. On the other hand, if the above amount exceeds 100 parts by weight, processibility becomes poor due to poor dispersion of carbon black and silica, and the temperature is increased, thus reducing wear resistance.
- the rubber composition for a tire tread of the present invention may further include other additives, such as zinc oxide, stearic acid, sulfur, an accelerating agent, an anti-aging agent, etc., which are typically added to the rubber for a tire tread.
- the polyaramide fiber which is characteristically added to the rubber composition for the tread of the present invention, is para-aramide fiber, and specifically co-poly-(paraphenylene/3,4-oxydiphenylene terephthalamide), having mechanical properties such as Young's modulus of 20-21 GPa and tensile strength of 3000-3250 MPa. Further, the surface of the fiber is treated with RFL (Resorcinol Formaldehyde Liquid) to enable the formation of a chemical bond with rubber, and thus low wear resistance, due to the use of conventional short fiber, may be alleviated. In addition, the addition of the para-polyaramide fiber having high Young's modulus and tensile strength results in high hardness, therefore increasing handling stability on dry roads.
- RFL Resorcinol Formaldehyde Liquid
- para-polyaramide fiber When such para-polyaramide fiber is used in the rubber composition for a tire tread, it may function as a stud of a stud tire and therefore can further improve driving force and braking power on snowy and icy roads than when not used.
- conventional short fiber or natural fiber is spherically arranged upon mixing with rubber
- the polyaramide fiber used in the present invention is oriented in its original linear shape thanks to its high Young's modulus and tensile strength, and thus is not easily separated by external impact. Also, such fiber, having high Young's modulus and tensile strength, functions to reinforce the mixed rubber.
- the para-polyaramide fiber is contained in the rubber composition of the present invention in an amount of 1-10 parts by weight based on 100 parts by weight of the solid content of the raw rubber. If the amount of fiber exceeds 10 parts by weight, processibility becomes poor. Further, excess use thereof results in poor dispersibility in rubber, undesirably decreasing wear resistance.
- the rubber composition of the present invention may further include a foaming agent, which is used in an amount of 3-4 parts by weight based on 100 parts by weight of the raw rubber.
- the rubber composition of the present invention containing the foaming agent is foamed rubber having 30-120 independent pores having a diameter of 20-140 ⁇ m per unit area of 1 mm 2 .
- Natural rubber, styrene-butadiene rubber, butadiene rubber, carbon black, and typical additives were mixed at mixing ratios shown in Table 1 below to prepare a rubber composition, which was then vulcanized, thus obtaining a rubber sample.
- the low-temperature hardness was determined using an ASTM shore A hardness meter (hardness at -20°C) after allowing the sample to stand in a temperature-controlled chamber for 1 hour.
- the ice friction coefficient was determined by measuring the friction coefficient of the sample at 30 km/hr on an icy road frozen for 24 hours using a dynamic friction tester (available from Sunny Koken).
- the wear test was conducted using a Lambourn wear tester. The wear performance was considered excellent when the index was high.
- the braking performance index was determined by subjecting a tire, manufactured at a size of 195/65R 15T using the rubber composition, to a braking test on various roads and then converting the results into the index. The higher the index, the shorter the braking distance.
- Aladmide Fiber Co-poly-(paraphenylene/3,4-oxydiphenylene terephthalamide) fiber, trade name of Technora, available from Teijin, Young's modulus of 20GPa, tensile strength of 3100Mpa, surface treatment with RFL (Resorcinol Formaldehyde Liquid).
- SBR Styrene Butadiene Rubber, having 20 ⁇ 25% of styrene, Mooney viscosity at 100°C of 55-65, stress relaxation time gradient of -0.30 ⁇ -0.38.
- BR Butadiene Rubber having 96% or more of 1,4-cis butadiene, resulting from solution polymerization.
- Process Oil 5 wt% of aromatic component, 45 wt% of naphthene component, and 50 wt% of paraffin component.
- the short fiber or natural fiber used is present in a spherical shape, whereas the para-polyaramide fiber of the present invention is present in its original linear shape in the rubber.
- the sample of Comparative Example 3 using the aradmide short fiber has lower tensile strength than that of the sample of Example 1, and the aramide short fiber used does not undergo surface treatment with RFL and thus has low bondability with the rubber, leading to decreased wear resistance.
- the short fiber or natural fiber does not preserve its original shape due to the high shear force required for mixing with rubber and is thus present in a spherical shape.
- the para-polyaramide fiber used in the present invention is present in its original linear shape thanks to its high Young's modulus and tensile strength, it is not easily separated by external impact. Further, the para-polyaramide fiber, having high Young's modulus and tensile strength, can form a chemical bond with rubber through surface treatment with RFL, and therefore functions as a reinforcing agent in the mixed rubber.
- the para-polyaramide fiber exhibiting such effects is excessively used, low-temperature hardness is greatly increased as in Comparative Example 4 and enveloping performance with the road is decreased, resulting in low braking performance on snowy and icy roads.
- the para-polyaramide fiber should be contained in the rubber composition of the present invention in an amount of 10 parts by weight or less.
- Example 3 and 4 and Comparative Example 7 the para-polyaramide fiber according to the present invention was used.
- the sample of Comparative Example 1 corresponded to typical foamed rubber, and the sample of Comparative Example 2 was conventionally composed of short fiber or natural fiber to increase ice braking performance.
- Comparative Example 4 as the aramide fiber, short fiber under the trade name of Kevlar was used, instead of the fiber used in the rubber composition of the present invention.
- the number of pores of the foamed rubber was observed with the naked eye and the number of independent pores having a diameter of 20-140 ⁇ m per 1 mm 2 of the rubber sample was counted.
- the low-temperature hardness was determined using an ASTM shore A hardness meter (hardness at -20°C) after allowing the sample to stand in a temperature-controlled chamber for 1 hour.
- the ice friction coefficient was determined by measuring the friction coefficient of the sample at 30 km/hr on an icy road frozen for 24 hours using a dynamic friction tester (available from Sunny Koken). The wear test was conducted using a Lambourn wear tester. The wear performance was considered excellent when the index was high.
- the braking performance index was determined by subjecting a tire manufactured at a size of 195/65R 15Q using the rubber composition to a braking test on various roads and then converting the results into the index. The higher the index, the shorter the braking distance.
- the wear resistance was determined in a manner such that a tire manufactured at a size of 195/65R 15Q was run a predetermined distance, after which weight loss of the tire was measured and then represented by a relative index.
- the handling stability was determined by measuring lap time upon running the tire manufactured in the above size at a predetermined distance, which was then represented by a relative index.
- BR Solution Polymerized Butadiene Rubber having 96% or more of 1,4-cis butadiene, resulting from solution polymerization.
- Process Oil 5 wt% of aromatic component, 45 wt% of naphthene component, and 50 wt% of paraffin component.
- Anti-aging Agent 6PPD 1*.Aramide Short Fiber: Poly-(paraphenylene terephthalamide (Chemical Formula), Kevlar (Trade Name), available from Dupont, Young's Modulus of 25 GPa, Tensile Strength of 2100 MPa.
- Aladmide Fiber Co-poly-(paraphenylene/3,4-oxydiphenylene terephthalamide) fiber, trade name of Technora, available from Teijin, Young's modulus of 20GPa, tensile strength of 3100Mpa, surface treatment with RFL (Resorcinol Formaldehyde Liquid). Hardness at -20(C (Shore A) 50 51 57 52 51 52 Ice Friction Coefficient (u) 0.35 0.41 0.42 0.39 0.40 0.45 Lambourn Wear Index 100 93 92 85 101 99 No.
- the used short fiber or natural fiber is present in a spherical shape, while the para-polyaramide fiber of the present invention is present in its original linear shape in the rubber.
- the samples of Examples 3 and 4 in which predetermined para-polyaramide fiber is added to the foamed rubber, have increased snow/ice braking performance and handling stability on dry roads as in the use of conventional short fiber or natural fiber, and improve wear resistance, which is decreased by the addition of conventional short fiber or natural fiber.
- the short fiber or natural fiber does not preserve its original shape due to the high shear force required for mixing with rubber and thus is present in a spherical shape, however the para-polyaramide fiber used in the present invention is present in its original linear shape thanks to its high Young's modulus and tensile strength, and thus is not easily separated by external impact. Further, the para-polyaramide fiber functions to reinforce the mixed rubber by virtue of its high Young's modulus and tensile strength.
- the present invention provides a rubber composition for a studless tire tread.
- the added para-polyaramide fiber may function as a stud of a stud tire, and thus driving force and braking power on snowy and icy roads may be increased.
- the polyaramide fiber is present in its original linear shape thanks to its high Young's modulus and tensile strength, and thus is not easily separated by external impact. Further, the polyaramide fiber, having high Young's modulus and tensile strength, can reinforce the mixed rubber, therefore maintaining wear resistance, leading to the prevention of abnormal wear and partial side wear of the tire.
- the foamed rubber composition of the present invention can increase handling stability on dry roads and wear resistance while exhibiting the excellent ice braking performance of conventional foamed rubber.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Claims (9)
- Eine Gummizusammensetzung für ein Reifenprofil eines Winterreifen, die Kautschuk, Styrol-Butadien-Gummi und Butadien-Gummi als Rohgummi umfasst, und die 1~10 Gewichtsanteile an Co-poly-(paraphenylene/3,4'oxydiphenylene terephthalamide) Faser basierend auf 100 Gewichtsanteile eines festen Inhalts des Rohgummis einschließen.
- Die Gummizusammensetzung nach Anspruch 1, bei der die Co-poly-(paraphenylene/3,4'oxydiphenylene terephthalamide) Faser über ein Young'sches Modul von 20-21 GPa und eine Reißfestigkeit von 3000-3250 MPa verfügen.
- Die Gummizusammensetzung nach Anspruch 1, bei der die Co-poly-(paraphenylene/3,4'oxydipherlylene terephthalamide) Faser zubereitet wird, indem kurze Fasern einer Oberflächenbehandlung mit Resorcin-Formaldehyd Flüssigkeit unterzogen werden.
- Die Gummizusammensetzung nach Anspruch 1, bei der es sich bei dem Gummi um Schaumgummi handelt, das 30~120 unabhängige Poren mit einem Durchmesser von 20~140 µm pro einer Flächeneinheit von 1 mm2 besitzt.
- Die Gummizusammensetzung nach Anspruch 4, die weiterhin 3~4 Gewichtsanteile eines Treibmittels basierend auf 100 Gewichtsanteile eines festen Inhalts des Rohgummis enthält.
- Die Gummizusammensetzung nach Anspruch 1 oder 4, die weiterhin ein Gummimischmittel enthält.
- Die Gummizusammensetzung nach Anspruch 6, bei der das Gummimischmittel aus der Gruppe ausgewählt wird, die aus Kohlenschwarz, Silica, Prozessöl, Zinkoxid, Stearinsäure, Schwefel, einem Beschleunigungsmittel, und einem Anti-Aging-Mittel besteht.
- Die Gummizusammensetzung nach Anspruch 7, bei der die Kohlenschwarz und Silice in einem Volumen von 40~90 Gewichtsanteilen basierend auf 100 Gewichtsanteile des festen Inhalts des Rohgummis enthalten sind.
- Die Gummizusammensetzung nach Anspruch 7, bei der das Prozessöl in einem Volumen von 20~35 Gewichtsanteilen basierend auf 100 Gewichtsanteile des festen Inhalts des Rohgummis enthalten ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050047548A KR100582003B1 (ko) | 2005-06-03 | 2005-06-03 | 스터드리스 타이어의 트레드용 고무 조성물 |
KR1020050047549A KR100582005B1 (ko) | 2005-06-03 | 2005-06-03 | 스터드리스 타이어의 트레드용 고무 조성물 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1736507A1 EP1736507A1 (de) | 2006-12-27 |
EP1736507B1 true EP1736507B1 (de) | 2007-09-19 |
Family
ID=37102958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20060076118 Ceased EP1736507B1 (de) | 2005-06-03 | 2006-05-26 | Kautschukzusammensetzung für spikelose Reifenlaufflächen |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060280925A1 (de) |
EP (1) | EP1736507B1 (de) |
JP (1) | JP4683490B2 (de) |
DE (1) | DE602006000118D1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4638950B2 (ja) * | 2008-09-01 | 2011-02-23 | 住友ゴム工業株式会社 | スタッドレスタイヤ用ゴム組成物及びスタッドレスタイヤ |
US20110086224A1 (en) * | 2009-10-13 | 2011-04-14 | E.I. Du Pont De Nemours And Company | Sheet and Method of Making Sheet for Support Structures and Tires |
CN105542267A (zh) * | 2011-02-23 | 2016-05-04 | 株式会社普利司通 | 橡胶组合物的制造方法 |
RU2014113228A (ru) * | 2011-10-18 | 2015-11-27 | Сумитомо Раббер Индастриз, Лтд. | Резиновая смесь для нешипованных зимних шин и нешипованная зимняя шина |
JP7053089B2 (ja) * | 2017-12-15 | 2022-04-12 | 株式会社ブリヂストン | ゴム組成物、加硫ゴム及びタイヤ |
WO2019116701A1 (ja) * | 2017-12-15 | 2019-06-20 | 株式会社ブリヂストン | ゴム組成物、加硫ゴム及びタイヤ |
KR20200021130A (ko) * | 2018-08-20 | 2020-02-28 | 한국타이어앤테크놀로지 주식회사 | 타이어 트레드용 고무 조성물 및 이를 이용하여 제조한 타이어 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4871004A (en) * | 1988-02-17 | 1989-10-03 | The Goodyear Tire & Rubber Company | Rubber containing aramid pulp reinforcement |
JPH0222332A (ja) * | 1988-07-12 | 1990-01-25 | Nichigou Rubber Kako Kk | 繊維強化ゴム組成物の製造法 |
JPH02308832A (ja) * | 1989-05-25 | 1990-12-21 | Yokohama Rubber Co Ltd:The | タイヤトレッド用ゴム組成物 |
JPH05147406A (ja) * | 1991-11-27 | 1993-06-15 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2838039B2 (ja) * | 1994-06-29 | 1998-12-16 | 株式会社エヌ、アイ、テイ | 芯材挿入硬化層の造成工法とその装置 |
US5576104A (en) * | 1994-07-01 | 1996-11-19 | The Goodyear Tire & Rubber Company | Elastomers containing partially oriented reinforcing fibers, tires made using said elastomers, and a method therefor |
JP3352546B2 (ja) * | 1994-11-11 | 2002-12-03 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物 |
JP3565382B2 (ja) * | 1996-07-10 | 2004-09-15 | 株式会社ブリヂストン | 空気入りタイヤ |
JPH11315166A (ja) * | 1998-03-03 | 1999-11-16 | Bridgestone Corp | ゴム組成物及びそれを用いた空気入りタイヤ |
CN1146509C (zh) * | 1998-10-28 | 2004-04-21 | 倍耐力轮胎公司 | 轮胎及其制造方法 |
KR100717292B1 (ko) * | 1998-10-28 | 2007-05-15 | 피렐리 타이어 소시에떼 퍼 아찌오니 | 타이어 및 타이어 제조 방법 |
US6497261B1 (en) * | 1999-02-03 | 2002-12-24 | Bridgestone Corporation | Pneumatic tire having tread made of foamed rubber composition |
EP1048691B1 (de) * | 1999-04-30 | 2004-12-08 | Bridgestone Corporation | Kautschukzusammensetzung für Reifen und Luftreifen |
JP2001011237A (ja) * | 1999-04-30 | 2001-01-16 | Bridgestone Corp | タイヤ用ゴム組成物及び空気入りタイヤ |
EP1226042B1 (de) * | 1999-07-09 | 2004-09-29 | PIRELLI PNEUMATICI S.p.A. | Hochleistungsreifen mit einer lauffläche, die eine temperaturstabile anisotropische unterschicht hat |
JP2002069239A (ja) * | 2000-08-28 | 2002-03-08 | Bridgestone Corp | タイヤのトレッド用ゴム組成物及びこれを用いたタイヤ |
US20020069948A1 (en) * | 2000-12-07 | 2002-06-13 | Sentmanat Martin Lamar | Polymeric product containing precisely located and precisely oriented ingredients |
JP2007505228A (ja) * | 2003-09-12 | 2007-03-08 | テイジン・トゥワロン・ビー.ブイ. | 合成繊維に含浸させるための二段法 |
-
2006
- 2006-05-26 DE DE200660000118 patent/DE602006000118D1/de active Active
- 2006-05-26 EP EP20060076118 patent/EP1736507B1/de not_active Ceased
- 2006-05-30 JP JP2006150407A patent/JP4683490B2/ja not_active Expired - Fee Related
- 2006-06-01 US US11/444,690 patent/US20060280925A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
DE602006000118D1 (de) | 2007-10-31 |
EP1736507A1 (de) | 2006-12-27 |
US20060280925A1 (en) | 2006-12-14 |
JP4683490B2 (ja) | 2011-05-18 |
JP2006336013A (ja) | 2006-12-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1736507B1 (de) | Kautschukzusammensetzung für spikelose Reifenlaufflächen | |
JP5527014B2 (ja) | タイヤ用ゴム組成物 | |
EP1897703A1 (de) | Reifen mit Lauffläche mit einer Übergangsschicht aus depolymerisiertem Gummi, vorgehärtetem Gummi oder Kohlenstaub | |
KR100582003B1 (ko) | 스터드리스 타이어의 트레드용 고무 조성물 | |
KR101000811B1 (ko) | 타이어 트레드 베이스용 고무 조성물 | |
EP2196325A1 (de) | Reifen mit einer Lauffläche, die Kohlenstaub umfasst | |
JP2003213044A (ja) | タイヤ用トレッドゴム | |
KR100582005B1 (ko) | 스터드리스 타이어의 트레드용 고무 조성물 | |
KR100975878B1 (ko) | 타이어 트레드용 고무 조성물 | |
KR100629109B1 (ko) | 타이어 트레드용 고무 조성물 | |
KR100432128B1 (ko) | 스터드리스 타이어 트레드용 고무 조성물 | |
KR100606190B1 (ko) | 스터드리스 스노우타이어 트레드용 고무조성물 | |
KR20070087873A (ko) | 겨울용 타이어 트레드 고무조성물 | |
KR100642055B1 (ko) | 스터드리스 타이어 트레드용 고무조성물 | |
KR101128763B1 (ko) | 겨울용 스터드레스 타이어 트레드 고무 조성물 | |
KR100570266B1 (ko) | 실리카 및 실란커플링제가 보강된 실리카 고무조성물 | |
KR101073117B1 (ko) | 타이어 트레드용 고무 조성물 | |
JP2004300340A (ja) | タイヤ用ゴム組成物及び空気入りタイヤ | |
KR100863682B1 (ko) | 스노우 센서를 적용한 스터드레스 스노우 타이어 트레드용고무 조성물 | |
KR100596494B1 (ko) | 스터드리스 타이어 트레드용 고무 조성물 | |
KR100846279B1 (ko) | 극세사 섬유를 적용한 스터드리스 스노우 타이어용 고무조성물 | |
KR100533941B1 (ko) | 스터드리스 타이어 트레드용 고무 조성물 | |
KR100635610B1 (ko) | 스터드레스 스노우 타이어용 트레드 고무조성물 | |
KR101582646B1 (ko) | 타이어용 트레드 고무 조성물 | |
KR20030079151A (ko) | 스터드리스 스노우 타이어 트레드용 고무 조성물 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KIM, SANG GOOLUCKY HANA APT. 101-1203 Inventor name: KIM, JUNG TAE401-501,YEOLMAEMAEUL 4-DANJI Inventor name: KIM, YONG JIN105-903, HANA APT. |
|
17P | Request for examination filed |
Effective date: 20070122 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AKX | Designation fees paid |
Designated state(s): DE FR GB HU IT |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB HU IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 602006000118 Country of ref document: DE Date of ref document: 20071031 Kind code of ref document: P |
|
EN | Fr: translation not filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20071220 |
|
26N | No opposition filed |
Effective date: 20080620 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080523 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080320 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20100526 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070919 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100526 |